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Hirasawa, Takashi; Yamada, Kazuyuki; Nagahisa, Keisuke; Dinh, Thai Nho; Furusawa, Chikara; Katakura, Yoshio; Shioya, Suteaki; Shimizu, Hiroshi
Process biochemistry (1991), 06/2009, Letnik: 44, Številka: 6Journal Article
The difference in responses to osmotic stress between the laboratory and sake-brewing strains of Saccharomyces cerevisiae at the translational level was compared by two-dimensional polyacrylamide gel electrophoresis. Proteins, whose production was significantly changed by the osmotic stress, were identified by peptide mass fingerprinting. In the laboratory strain, translation of Hor2p, the protein responsible for glycerol biosynthesis, and Ald6p, related to acetate biosynthesis, was induced under high osmotic pressure conditions. In addition, production of proteins related to translation and stress response was also changed under this condition. On the other hand, in the sake-brewing strain, translation of Hor2p, Hsp26p, and some stress-related proteins was upregulated. The change in the production of enzymes related to glycolysis and ethanol formation was small; however, the production of enzymes related to glycerol formation increased in both strains. These results suggest that enhancement of glycerol formation due to enhancement of the translation of proteins, such as Hor2p, is required for growth of S. cerevisiae under high osmotic pressure condition. This is the first report on the analysis of responses of a sake-brewing strain to high osmotic pressure stress based on proteomics.
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